Data claims that all three Tachyon beams are coming from the Enterprise - but the future timeline beam was from the USS Pasteur, not the Enterprise.

When Picard wants to go into the Neutral Zone, Tomalak agrees so long as a Romulan ship can go as well. That's the last we see of Romulans in this episode. What happened to their ship?

When the Pasteur and the Enterprise-D reach the site of the anomaly in the future, nothing is there. Yet when the E-D returns some time later, the anomaly is there. If the anomaly gets bigger in the past, then it should have already been there when the Pasteur first arrived. Or is there an eruption of time which gets bigger in the future to match the eruption of anti-time which gets bigger in the past?

Great Moment :

Where to start, a fitting end to the series. To choose one part I would have to go with Picard finally siting down at the poker game.

Body Count :

The crew of the two Negh'Var type ships in the future, plus the crew of at least two of the Enterprise-D ships which we see. All turn out not to have actually happened in the real timeline though.

Plotline

Q shows us that some trials last forever as Picard must save the Human race from annhilation by leaping between past, present and future to make the ultimate journey of exploration.